72128079 has 12 divisors (see below), whose sum is σ = 105441336. Its totient is φ = 47505552.

The previous prime is 72128057. The next prime is 72128081. The reversal of 72128079 is 97082127.

It is not a de Polignac number, because 72128079 - 2⁸ = 72127823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72128099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47532 + ... + 49025.

It is an arithmetic number, because the mean of its divisors is an integer number (8786778).

Almost surely, 2^72128079 is an apocalyptic number.

72128079 is a deficient number, since it is larger than the sum of its proper divisors (33313257).

72128079 is a wasteful number, since it uses less digits than its factorization.

72128079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96646 (or 96643 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72128079 is about 8492.8251483237. The cubic root of 72128079 is about 416.2632990908.

The spelling of 72128079 in words is "seventy-two million, one hundred twenty-eight thousand, seventy-nine".